I am planning to sell my old 3ds xl with some games installed as well as ambassador games, i got some question. Should I just update to the newest firmware and update the game and just unlink my nnid from the system? And if the buyer choose,. he/she/it can transfer my game off my 3ds to w/e they choose correct? And what if they have games installed on their 3ds and transfer my 3ds file off, what will happen?